TL3695DRG4 Equivalent & Substitute Parts

Part Overview

The TL3695DRG4 is a half-duplex RS422/RS485 transceiver IC manufactured by Texas Instruments in an 8-SOIC surface mount package. This part is classified as obsolete, with 1053 units currently in stock. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for ongoing design support, production continuity, and long-term component availability planning.

Key Parameters

Parameter	TL3695DRG4 Specification
Manufacturer	Texas Instruments
Part Number	TL3695DRG4
Product Status	Obsolete
Type	Transceiver
Protocol	RS422, RS485
Drivers/Receivers	1/1
Duplex Mode	Half
Package	8-SOIC (0.154", 3.90mm Width)
Voltage Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Receiver Hysteresis	120 mV
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TL3695DRG4 are selected based on strict electrical and mechanical compatibility criteria:

Primary Selection Criteria:

Package type: 8-SOIC (0.154", 3.90mm Width) — mandatory for direct PCB replacement
Protocol support: RS422 and/or RS485 capability
Configuration: Half-duplex, 1 driver/1 receiver
Mounting type: Surface mount

Secondary Compatibility Factors:

Voltage supply range overlap with 4.75V ~ 5.25V nominal operation
Operating temperature range that encompasses or extends the original 0°C ~ 70°C specification
RoHS3 compliance and MSL rating for manufacturing compatibility

Substitutes are categorized into two groups: parametric equivalents (matching all core electrical specifications) and manufacturer-recommended alternatives (active production parts with enhanced or modified specifications).

Parameter Comparison

Part Number	Manufacturer	Status	Protocol	Package	Voltage Supply	Temp Range	Receiver Hysteresis	Data Rate
TL3695DRG4	Texas Instruments	Obsolete	RS422, RS485	8-SOIC	4.75V ~ 5.25V	0°C ~ 70°C	120 mV	—
TL3695DR	Texas Instruments	Obsolete	RS422, RS485	8-SOIC	4.75V ~ 5.25V	0°C ~ 70°C	120 mV	—
THVD1550DR	Texas Instruments	Active	RS485	8-SOIC	4.5V ~ 5.5V	-40°C ~ 125°C	50 mV	50Mbps
ADM4853ARZ-REEL7	Analog Devices Inc.	Active	RS422, RS485	8-SOIC	4.75V ~ 5.25V	-40°C ~ 85°C	20 mV	10Mbps
HI-4853PSHF	Holt Integrated Circuits Inc.	Active	RS422, RS485	8-SOIC	3.15V ~ 5.5V	-55°C ~ 175°C	—	20Mbps
ISL3179EIBZ-T	Renesas Electronics Corporation	Active	RS422, RS485	8-SOIC	3V ~ 3.6V	-40°C ~ 85°C	28 mV	40Mbps
ISL43485IBZ-T	Renesas Electronics Corporation	Active	RS422, RS485	8-SOIC	3V ~ 3.6V	-40°C ~ 85°C	50 mV	50Mbps
ISL83483IBZ	Renesas Electronics Corporation	Active	RS422, RS485	8-SOIC	3V ~ 3.6V	-40°C ~ 85°C	50 mV	250kbps
ISL4485EIBZ	Renesas Electronics Corporation	Obsolete	RS422, RS485	8-SOIC	4.5V ~ 5.5V	-40°C ~ 85°C	70 mV	20Mbps

Engineering Selection Recommendations

Parametric Equivalent (Direct Replacement): TL3695DR is the parametric equivalent of TL3695DRG4, sharing identical electrical specifications and voltage supply range. However, both parts are obsolete. This option is suitable only for legacy system maintenance where exact specification matching is required.

Active Production Alternatives:

For new designs or production transitions, the following active parts provide functional substitution with enhanced specifications:

ADM4853ARZ-REEL7 (Analog Devices Inc.) maintains the original 4.75V ~ 5.25V supply voltage range and RS422/RS485 dual protocol support. It extends the operating temperature range to -40°C ~ 85°C and includes ROHS3 compliance. This part is recommended for applications requiring voltage supply compatibility with the original design.

THVD1550DR (Texas Instruments) is an active Texas Instruments alternative supporting RS485 operation with extended temperature range (-40°C ~ 125°C) and higher data rate capability (50Mbps). Supply voltage range is 4.5V ~ 5.5V, which overlaps the original specification. This part is suitable for applications where extended temperature performance is beneficial.

HI-4853PSHF (Holt Integrated Circuits Inc.) offers the widest supply voltage range (3.15V ~ 5.5V) and extended temperature range (-55°C ~ 175°C), supporting both RS422 and RS485 protocols. This part is appropriate for harsh environment applications or designs requiring extreme temperature tolerance.

ISL3179EIBZ-T and ISL43485IBZ-T (Renesas Electronics Corporation) are low-voltage alternatives operating at 3V ~ 3.6V supply. These parts support RS422/RS485 protocols and offer higher data rates (40Mbps and 50Mbps respectively). Selection of these parts requires circuit redesign to accommodate the lower supply voltage.

ISL83483IBZ (Renesas Electronics Corporation) operates at 3V ~ 3.6V with RS422/RS485 support but is limited to 250kbps data rate, suitable for low-speed industrial applications.

All recommended active parts maintain 8-SOIC packaging, ROHS3 compliance, and MSL-1 or MSL-3 ratings compatible with standard manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can TL3695DR be used as a direct replacement for TL3695DRG4? A: Yes. TL3695DR is a parametric equivalent with identical electrical specifications, voltage supply range (4.75V ~ 5.25V), operating temperature (0°C ~ 70°C), and receiver hysteresis (120 mV). Both parts are obsolete; however, TL3695DR has higher inventory availability (1510 units vs. 1053 units).

Q: What is the primary difference between the TL3695DRG4 and THVD1550DR? A: THVD1550DR is an active production part with enhanced specifications. Key differences include: THVD1550DR supports RS485 only (vs. dual RS422/RS485), operates at higher data rates (50Mbps vs. unspecified), and extends temperature range to -40°C ~ 125°C. Supply voltage range is slightly broader (4.5V ~ 5.5V vs. 4.75V ~ 5.25V).

Q: Are low-voltage Renesas parts (ISL3179EIBZ-T, ISL43485IBZ-T) compatible with the original 5V supply? A: No. These parts operate at 3V ~ 3.6V supply voltage and are not compatible with the original 4.75V ~ 5.25V supply without circuit redesign. They require a separate 3.3V power rail and are suitable only for new designs or complete system modifications.

Q: Which substitute part offers the widest operating temperature range? A: HI-4853PSHF provides the widest temperature range (-55°C ~ 175°C), making it suitable for industrial, automotive, or extreme environment applications. It also supports the broadest supply voltage range (3.15V ~ 5.5V).

Q: Do all substitute parts maintain the same package footprint? A: Yes. All listed substitute parts use the 8-SOIC (0.154", 3.90mm Width) package, enabling direct PCB footprint compatibility without layout modifications.

Q: What is the significance of receiver hysteresis differences? A: Receiver hysteresis affects noise immunity and signal stability. The original TL3695DRG4 has 120 mV hysteresis. Substitutes range from 20 mV (ADM4853ARZ-REEL7) to 70 mV (ISL4485EIBZ). Lower hysteresis values increase sensitivity but may require cleaner signal conditioning in noisy environments.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant and suitable for modern manufacturing processes. Moisture sensitivity levels range from MSL-1 (unlimited) to MSL-3 (168 hours), all compatible with standard PCB assembly procedures.

Q: Which substitute part is recommended for new designs? A: For new designs requiring 5V supply compatibility, ADM4853ARZ-REEL7 is recommended due to active production status, voltage range alignment, and extended temperature capability. For applications benefiting from higher data rates and Texas Instruments continuity, THVD1550DR is suitable with minor supply voltage adjustment (4.5V ~ 5.5V vs. 4.75V ~ 5.25V).

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